Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd5c4bb9197c041…

MALICIOUS

PDF

36.2 KB Created: 2020-08-05 14:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd7cff0529454ab50d89c611260fb678 SHA-1: b3b221fc08cee539e78de4e09eabb80aaaeeaedd SHA-256: edd5c4bb9197c041e6a78273ccc45490593243bc6458eab5fce0a6a2f49b4ed4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to ttraff.cc, indicating a likely phishing or malware distribution attempt. The document body, though partially corrupted, contains metadata suggesting it was generated by wkhtmltopdf and includes the malicious URL, reinforcing the attack pattern. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=guide+officiel+mass+effect+andromeda+pdf
    • http://files.bryankisby.com/uploads/1/3/1/6/131636792/330366.pdf
    • http://lixurafas.robertsgrouput.org/uploads/1/3/1/4/131409200/5647118.pdf
    • http://files.albanyreflexology.com/uploads/1/3/2/7/132740951/b485581255b67.pdf
    • http://files.josephmuscatartist.com/uploads/1/3/2/8/132816195/vojubowegajivogaloxo.pdf
    • http://files.employmentcollaborative.com/uploads/1/3/1/4/131437041/gatulusor_gitus_liludazizod_dodati.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/73701649016.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/jabibaxitilibiludi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/sixarosilarurarasonabebet.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/python_strip_punctuation.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/sisirufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/xobuwupedes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/pokemon_adventure_red_walkthrough_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/91169822268.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/xulidabik.pdf
    • https://cdn.shopify.com/s/files/1/0440/7925/1608/files/43954797405.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/9069092902.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e64.bin
090cbb08ab7136253a1b28789161db2fac0c565d93c1b6d957fc6e54a25fadde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E64 5332 bytes
font_01_sfnt_off00006070.bin
4ba0471f66afad7910674423fffedccbfee7040c8a65bc377f2ea198c7fc8992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6070 10356 bytes

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